bottom level switches in the converter, that phase is linked to the harmful dc bus and becomes negative. Thus, we are able to make any stage on the electric motor become positive or detrimental at will and will hence generate any frequency that we want. So, we are able to make any phase be positive, negative, or zero.
If you have an application that does not have to be operate at full velocity, then you can decrease energy costs by controlling the electric motor with a variable frequency drive, which is one of the advantages of Variable Frequency Drives. VFDs allow you to match the swiftness of the motor-driven tools to the load requirement. There is no other method of AC electric electric motor control which allows you to do this.
By operating your motors at most efficient swiftness for your application, fewer errors will occur, and therefore, production levels increase, which earns your company higher revenues. On conveyors and belts you eliminate jerks on start-up permitting high through put.
Electric motor systems are responsible for more than 65% of the power consumption in industry today. Optimizing engine control systems by setting up or upgrading to VFDs can reduce energy usage in your facility by as much as 70%. Additionally, the utilization of VFDs improves item quality, and reduces creation costs. Combining energy effectiveness tax incentives, and utility rebates, returns on investment for VFD installations can be as little as six months.